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Physical Properties of Alcohols and Phenols

the freezing ...

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the freezing point of a solution of 2.40g of biphenyl in 75g of benzene is 4.40^° C .the normal freezing point of benzene is 5.50^° C. what is the molal freezing point cons†an t (^° C/m) fod benzene

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Q. Pure benzene freeze at

{5.45}^{\circ} C . A

solution containing 7.24 g of

C_{2} H_{2} C l_{4}

in 115.3 g of benzene was observed to freeze at

{3.55}^{\circ} C

. What is the molal freezing point constant of benzene?

Q. The freezing point of a solution containing

4.8 g

of a compound in

60 g

{4.48}^{\circ} C

. What is the molar mass of the compound?
Given

K_{f} for benzene = 5.1 K m^{- 1}

and freezing point of pure benzene is

{5.5}^{\circ} C

Q. The molal freezing point depresssion constant of benzene is

4.90 {Kkgmol}^{- 1}

. Selenium exists as a polymer of the type

S e_{x}

3.26 g

of selenium is dissolved in

226 g

of benzene, the observed freezing point is

0.112^{\circ} C

lower than pure benzene. What is

x

Q. The freezing point depression constant

(K_{f})

5.12 {K kgmol}^{- 1}

. The depression of freezing point for the solution of molality

0.078 m

containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

Q. A solution of ester in benzene freezes at

0.84 K

temperature, blow the freezing point of the solution. What is the molality of the solution if

k_{f}

5.12 K k g m o l^{- 1}

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